Rotary duplicator



H p il 30, 1940."

S. HORII 4 ROTARY DUPLICATOR 2 Sheets-Sheet 1 April 30, 1940. s. HQRIIROTARY DUPLICA'IOR V Filed Aug. 7,1939 2 Sheets-Sheet 2 Patented Apr.30,1940

UNITED STATES PATENT omen 2 Claims.

This invention relates to a rotary duplicator for use in duplicatingmanuscript or typewritten dtocunients, drawings and the like, employinga s enci J One of the objects of this invention is provide a rotaryduplicator in which means is employed for preventing the press rollerfrom being spoiled when there is fed nopaper to be printed. Anotherobject of the invention is to provide a simple and effective means foradjusting the head margin of the print. a

In the accompanying drawings: Figure 1 is a side elevation of a rotaryduplicator according to this invention, with the cover re- 1| moved to.show the mechanisms; l

Figure 2 is a front view showing in detail the paper feeler device; a

Figure 3 is a detail of the mechanism for controlling the movement ofthe press roller;

I go Figures 4 and 5 are details showing two different positions of themechanism operatively connected to the feeler device, and

Figures 6 and 7 are details showing two different positions of themechanism for varying the point of start of the movement of the pressroller for the purpose of regulating the head margin of the print.

Referring to the drawings, upon a machine frame I there are mounted aprinting drum 2 and an inking drum 3 around which an endless silkscreen4 is passed as usual. 5 is an operating handle for rotating the drurn 2through gears 5 and I. By operating said handle 5, rotation is alsotransmitted through gears 8, 9 and In to a driving shaft ll of a paperfeeding device. Feeding elements l2 are operatively connected to saiddriving shaft it through a suitable link mechanism, so

- that the feeding elements I2 are adapted to be moved back and forth incontact with the uppermost layer of the pile of papers. A press rollerl3 is journalled in bearings which are mounted on the free ends of armsI5 fixed to a rod H which is rotatably 'mounted on the frame. Theabovementioned parts are of known construction, and it will not requireany further description.

At an ,outer extremity of said rod l4, there is fixed another arm,l5'carrying at its free end a pin [6. Fixed to the shaft ll of the gear 9.there is a cam l8 which is adapted to engage with an '50 antifrictionroller 20 provided at the upper end with the roller 2l|.- Pivoted to thevertical 85 I9 at 2i is a lifting lever 22 havingahookedportion engagingwith the pin I 5 and serving to lift the press roller II. The hookedportion of said lever 22 has two engaging portions, the first engagingportion 22 and the second engaging portion 22",the former being normally,in engagement with the pin l6 ofthe arm l5.

A paper feeler 23 is fixed to a horizontal feeler rod 24 which isjournalled in the frame. Said rod 24 has fixed to one of its outer endsacontrolling lever 2 5 which is adapted to engage with a proiec-' 10 tion26 extending from the upper end of the lifting lever 22. As far as theprinting paper A passes along the paper guide 21 as shown in Figure 4,the

feeler arm 23 is held in\ light contact with the paper by gravity. Onthe contrary, if there is no 15 of the cam l8 will be oscillatedcounter-clockwise,

because the projection 26 is caught by the lower end of the controllinglever 25. Consequently, the 25 pin I8 on the arm l5 will be transferredfrom the first engaging portion 22' into the second engaging portion 22"as shown in Figure 5. Thus, even at the end of the upward movement ofthe vertical .bar It the lifting lever 22 will never move the 30 am l5for its full stroke, so that the press roller I! will not come intocontact with the printing drum'2.

By operating the handle 5, the paper feeding device will be actuated aswell as the printing 35 drum 2, thereby effecting automatic feed of theP pers, so that so far as-there is not anytrouble in said feeding devicea sheet of paper will always pass alongthe paperguidefl almostcontinuously,

so that the free end of the feeler 23 does not drop into the depression28. Consequently, the controlling lever 25 is held in an inclinedposition as shown in Figure 4, so that the projection '25 on the liftinglever 22 will not be caught by the lower end of the controlling lever25, but it will be 5 moved upwardly in contact with the back of thecontrolling lever 25, turning the latter counterclockwise, permittingthe press roller l3 to move through its full stroke to corneintopressing contact with the sheet of paper A against the printing drum 2,thereby completing the printing operation as shown in Figure 3.

' As shown in Figure 1, an operating lever 28 is operatively connectedto the lifting lever 22 by means of a bell. crank and a link 3|. By saidmanually actuated so as to have its hooked portion disengaged from thepin It, so that the press roller l3is always held in an inoperativeposition.

For the purpose of adjusting the head margin of the print, means isprovided for varying the angular position of thehig'h point- (orstarting point) of the cam l8 relative to the roller 2|! on the verticalbar l9 by shifting said roller 20 to the leading angular position whichis in line with the line a or to the retarding angular position which isin line with line b as shown in Figures 3, 6 and 7. o is the neutralposition.

32 is an adjusting'wheel for effecting the margin adjustment.- Fixed toa stud 33 of said wheel 32 is an eccentric disc 34. A horizontal bar 35has a projection 36 which is normally held in engagement with theperiphery of the eccentric .disc 34 by means of a spring 31. Pivoted at38 to; the left end of the horizontal bar 35 is a three-armed lever 39having a cam-like arm 40 and an actuating arm 4|. Third arm of the lever39 is normally pulled downwardly and held in engagement with the upperedge of the horizontal lever 35 by means of a. spring 42. The cam 18 hasan antifriction roller 43 which is adapted ,to act upon thecamlike'armMl, and an antifriction roller 44 on the vertical bar I9 isadapted to be actuated by the actuating arm 4| .of the three-armed lever39 at predetermined period of time during the cycle of rotation of thecam Hi. The adjusting wheel 32 is provided with a reference vmark 45adapted to co-operate with another mark (not shown) provided on theframe for reading the rate of the margin adjustment. A pivoted arm 46 isprovided for engaging with a projection 41 on the vertical bar '|9 whenthe latter swings to the right as shown in Figure '7, said arm 46serving to prevent the return movement of said projection 61.

At the first part of the cycle of operation of the printing drum 2, thepress roller I3 is held in its lowered position, so that the sheet ofpaper fed'by the feeding elements I2 is not gripped by said drum 2 andthe press roller l3. As the cam shaft rotates, the cam I8 pushes theroller 20., lifting the vertical bar .l9 and, consequently, the liftinglever 22 will lift the press roller l3 through the pin |6, arm l5, rodI4, arm i5, so that the printing is started by gripping the paper Abetween the drum 2 and the press roller l3 as shown in Figure 3. In thisposition, while the roller 44 is engaged by the actuating arm 4|, itwill be released from the arm 4| as the cam l8 rotates and the roller 43thereon presses the cam-like arm 49 integral with said actuating arm 4|,so that the vertical bar 19 will tilt to the position of line b shown inFigure 7. When the roller 43 proceeds farther and releases the cam-likearm 40, as shown in' In Figure 3, when the adjusting wheel 32 isslightly rotated counter-clockwise, whereby the three-armed lever 39 isset shifted to the left, the roller 44 on the vertical bar l9 whilemoved upwardly will be pushed to the left by the actuating arm 4|, sothat the vertical bar l9 together with the roller 20 will assume theleft inclined position 1. A rotary duplicator comprising a printingdrum, driving means for said printing drum, a press roller adapted topress the paper under printing against said printing drum, a paperfeeding device actuated from said printing drum driving means, arotating cam driven from said printing drum driving means, a verticalbar actuated by said rotating cam. a lifting lever pivoted to saidvertical bar and having a hooked portion provided with the first andsecond engaging portions apress roller lifting arm having a projectionand connected to bearings of said press roller,

said projection being adapted to be engaged by said first and secondengaging portions alternatively, and a paper feeler device having adepending controlling lever which is adapted to control the position ofsaid lifting lever so as to place said lifting lever in such positionthat the said first engaging portion engages with the press rollerlifting arm when there is a sheet of paper under said feeler and in suchposition that the said second engaging portionengages with the pressroller lifting arm when there is no paper under said feeler, so that thepress roller lifting arm does not lift the press roller for its fullstroke.

2. A rotary duplicator comprising a printing drum, drivingmeans for saidprinting drum, a press roller adapted, to press the paper under printingagainst said printing drum, a paper feeding device actuated from saidprinting drum driving means, a rotating cam driven from said print= ingdrum driving means; a vertical bar having an antifriction rollerengaging with and actuated by said rotating cam, a lifting lever pivotedto said vertical bar and having a hooked portion engaging with aprojection belonging to an arm \connected to bearings of said pressroller, and means for varying the angular position of said antifrictionroller on the vertical bar relative to said cam so as to vary the timeof start of lifting the press roller with respect to therotation of theprinting drum, whereby adjusting the head margin of the print.

SHINJmp HURE.

